Why do geese fly in a V-formation?

Question

Why do geese fly in a V-formation? Who decides who's going up front?Tony, Chislehurst

Answer

** Definitive **Name: Nick, EpsomQualification: I love birdsAnswer: They benefit from slipstreaming in that aero-dynamic formation. But also, they check navigate each other when they do long migration. They have more dominant birds in their flock, who lead the pack. The dominant birds swap over when they are tired so they share who is at the front.